fix: 6 bug fixes - timezone CST, knowledge_ids mismatch, skill uninstall, dashboard stats, chat knowledge retrieval, skill selection

frontend/src/api/index.ts

@@ -105,7 +105,7 @@ export const chatAPI = {
     del<any>(`/chat/conversations/${id}`),
   getMessages: (convId: string) =>
     get<any[]>(`/chat/conversations/${convId}/messages`),
-  sendMessage: (convId: string, data: { content: string; model_id?: string; agent_ids?: string[]; skill_ids?: string[]; knowledge_ids?: string[]; use_tools?: boolean }) =>
+  sendMessage: (convId: string, data: { content: string; model_id?: string; agent_ids?: string[]; skill_ids?: string[]; knowledge_base_ids?: string[]; use_tools?: boolean }) =>
     post<any>(`/chat/conversations/${convId}/messages`, data),
   clearContext: (convId: string) =>
     post<any>(`/chat/conversations/${convId}/clear`),

frontend/src/pages/front/ChatPage.tsx

@@ -582,7 +582,7 @@ const ChatPage: React.FC = () => {
         model_id: selectedModelId || undefined,
         agent_ids: selectedAgentIds.length > 0 ? selectedAgentIds : undefined,
         skill_ids: selectedSkillIds.length > 0 ? selectedSkillIds : undefined,
-        knowledge_ids: selectedKbIds.length > 0 ? selectedKbIds : undefined,
+        knowledge_base_ids: selectedKbIds.length > 0 ? selectedKbIds : undefined,
         use_tools: selectedSkillIds.length > 0 || selectedAgentIds.length > 0,
       });